Dual Universal Switched-Capacitor Filters

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3

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Clock Input Low

0.5

V

Clock Duty Cycle

50

± 5%

SHDN AND EXTCLK

Input High

VIH

VDD - 0.5

V

Input Low

VIL

0.5

V

Input Leakage Current

VINPUT = 0 to VDD

±0.4

±10

μA

POWER REQUIREMENTS

Supply Voltage

VDD

4.5

5.5

V

Power-Supply Current

IDD

No external load, mode 1, R1 = R3 = 50k

Ω,

R2 = 10k

Ω, Q = 5

3.5

4.0

mA

Shutdown Current

ISHDN

SHDN = GND

1

μA

INTERNAL OP AMPS CHARACTERISTICS

Output Short-Circuit Current

±18

mA

DC Open-Loop Gain

RL

≥ 10kΩ, CL ≤ 50pF

130

dB

Gain Bandwidth Product

GBW

RL

≥ 10kΩ, CL ≤ 50pF

7

MHz

Slew Rate

SR

RL

≥ 10kΩ, CL ≤ 50pF

6.4

V/

μs

ELECTRICAL CHARACTERISTICS—MAX7490 (continued)

(VDD = VEXTCLK = +5V; fCLK = 625kHz; 10kΩ || 50pF load to VDD/2 at LP_, BP_, and N_/HP_; VSHDN = VDD; 0.1µF from COM to

GND; 50% duty-cycle clock input; COM = VDD/2; TA = TMIN to TMAX. Typical values are at TA = +25°C, unless otherwise noted.)

(Note 1)